From Longman Dictionary of Contemporary Englishsore point/spot/subject (with somebody)sore point/spot/subject (with somebody)UPSETsomething that is likely to make someone upset or angry when you talk about it Just don’t mention it – it’s always been a sore point with him. → sore
Examples from the Corpus
sore point/spot/subject (with somebody)• And now she had pierced her again in this sore spot.• Graduate entry with resultant opportunities for promotion was then - as now - an especially sore point.• The potential restriction of physician income is a major sore point.• Tom gently washed Willie's body again and smoothed witch-hazel on to the sore spots.• Finally, there are plans to provide custodians a sore point to enable the churches to open for two hours a day.• It is still a sore point with both grandparents that neither Alice nor Henry have been baptized.• This is a sore spot with me. 